Re: Is This a Remington Revolver ?
It looks like a Remington Beals Army. But not quite.
I am very much inclined to think it is a repro with the markings removed. There are just too many things that don't look right. The hammer is wrong for a Remington, and the angle of the topstrap and frame is not right. The trigger guard is the wrong shape, not just at the bow but at the point where the top meets the guard itself. The rammer could be a replacement (an 1861 rammer would fit), but it is wrong for a Beals. The barrel is too short, and looks like it was cut off. The frame appears to be a modern casting.
All in all, I have a lot of doubts, in spite of the opinions of your friends. If you are considering investing any serious amount of money, you need a hands on appraisal by a real expert.
FWIW, no southern (CS) factory made a direct copy of the Remington; Spiller & Burr (a copy of the Whitney) came close, but I can assure you that is not a Spiller & Burr. If your friends know of any northern factories that made Remington copies, or anything that could even be confused with a Remington, I would like to know of them (again, the Whitney is a bit like the Remington, but no knowledgeable person could possibly confuse them, then or now).